Boorrrringggg Build/Rebuild/Refres&restore

[puskrat]

parts are in! yesterday my Genuine Mikuni pilot and main jets arrived from partsreloaded, my gaskets came in from mikesxs, and I 'spect I'll see my new float needle ass'lies (jetsrus) first of the week. I'll be reinstalling four identical 266/X-2 needle jets unless someone can fill in the mystery with the part number and a source on the other tubes. My carbs are 79s, in which specs call for different needle jets in the interior carbs than the exterior. I'm willing to put them back in because the bike is claimed to have been running as is at one time, and because the "jets for cooling" solution was abandoned by Yamaha anyway. Somebody stop me if I'm being crazy.

[bikerphil]

I'll be reinstalling four identical 266/X-2 needle jets

That is fine, the only model to have 2 different types was the 79 Special. Not a worry.

[puskrat]

That is fine, the only model to have 2 different types was the 79 Special. Not a worry.

ROCK AND ROLL then

[puskrat]

ugh. My jetsrus float valve assemblies are K&L. I've learned to consider that profanity. Dare I put them to use?

I ended up doubled on float valves, as I got the carb kit from mikes, rather than just gaskets. Haven't ID'ed their manufacture yet.

[DiverRay]

I would get the Mikuni needles! IF you look at the K&L, you will probably find each needle's spring pushes at a different rate. This is NOT what you want. Go with the viton tip Mikuni needles and use the K&L seats, or return the jetsrus parts and just get needles and use the mikes seats. Big thing is ONLY the Mikuni Needles and jets.

[puskrat]

Thanks for confirming. i hate to be anal about stuff, but after the stern warnings regarding K&L jets, I've come to expect no good from anything they make.

[motoman]

I would get the Mikuni needles! IF you look at the K&L, you will probably find each needle's spring pushes at a different rate. This is NOT what you want. Go with the viton tip Mikuni needles and use the K&L seats, or return the jetsrus parts and just get needles and use the mikes seats. Big thing is ONLY the Mikuni Needles and jets.

Totally agree with Ray! The teeny springs in the aftermarket float needles vary in compression rate, which varies each float bowl fuel level. That varience can be as much as 2mm related to actual fuel level in float bowl.

[puskrat]

Found some from partzilla. That is, if the seats match the photos.

[DiverRay]

You just need to verify it says "viton tip" needle.

[puskrat]

Um, arent the viton tips for later carbs?

[DiverRay]

Yes, they are for later carbs, but work in earlier ones as well. The good thing about them is they are forgiving with minor defects in the seat.

[puskrat]

Starting to put stuff back together. True to expectation, I am still finding failed cleaning duties as I go, but they're getting fixed. Should I lube the threads of jets, seats, diaphram cap screws or float screws? Saw it mentioned in vids, but not on this site. I trust y'all better than youtubers.

[DiverRay]

No, no lube on threads.

[puskrat]

Thanks Ray

[puskrat]

getting obsessive about stuff. is it okay to put threadlocker on my bowl and/or cap screws?